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Use this HVAC air-to-air heat exchanger and ERV calculator t...

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For AHU cooling coil disinfection, conventional 254 nm UVC m...

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Use this calculator to check high latent load cooling and de...

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Use this calculator to estimate minimum natural ventilation ...

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Use this AS 1668.2 bathroom and toilet exhaust ventilation c...

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In the instance of a bicycle pump experiment, you will notic...

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Use this calculator to estimate the sensible and latent heat...

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Use this calculator to estimate the sensible and latent heat...

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This stair pressurisation calculator estimates the prelimina...

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Use this AS 1668.2 mechanical exhaust ventilation rate look-...

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Use this calculator to estimate the total pressure drop acro...

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Use this room pressurisation calculator to estimate the airf...

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Small in Window Air Conditioner Units In...

As its name suggests, unitary window air conditioners consis...

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AS1668.2 2012 Appendix A Minimum OA

Use this AS 1668.2 outdoor air ventilation rate look up tool...

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Use this cooling tower water use calculator to estimate the ...

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When condenser fins become brittle, flake and fall apart whe...

How to size buffer tank

Buffer tank sizing is not an arbitrary exercise. Typical gui...

Heat energy and change of phase

Heat energy and change of phaseComfort air conditioning syst...

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Both AS 1668.2 and AS/NZS 3666.1 recognise that bringing out...

HVAC Sheet Metal Zinc Coating

Zinc coating selection is critical for HVAC sheet metal dura...

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Use this room pressurisation calculator to estimate the airf...

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Natural Ventilation FAQ

Natural ventilation can be an effective way to provide outdo...

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What do you want from your BMS. Part 3: Direct Expansion Eva...

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Let’s take a cylinder of R22 at an ambient temperature...

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When you walk into a warehouse or sports arena with high-bay...

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In the instance of a bicycle pump experiment, you will notic...

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Use this calculator to estimate solar collector area, storag...

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Use this calculator to estimate the airflow required to main...

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

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Although engineers and technicians need to know how the valu...

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Average Person Sensible and Latent Heat ...

Use this calculator to estimate the sensible and latent heat...

So What is New in Refrigerant?

From CFCs to HFOs, how Refrigerant Policy Evolved from Ozone...

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In the instance of a bicycle pump experiment, you will notic...

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For those who have been to Malaysia, the first thing you eve...

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As its name suggests, unitary window air conditioners consis...

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A chiller controls its capacity mainly by maintaining the le...

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Space explorations to the moon, other planets, and beyond ha...

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Use this calculator to estimate the airflow required to main...

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Condensate trays must be graded to drain continuously and pr...

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The busbar insulation has deteriorated, exposing the live co...

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Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

Passive House (Haus) Designs, Heat Recov...

The rise of Passive House design has fundamentally reshaped ...

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When condenser fins become brittle, flake and fall apart whe...

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As its name suggests, unitary window air conditioners consis...

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Use this generator room ventilation calculator to estimate t...

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Use this cooling tower water use calculator to estimate the ...

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One of the common reasons to adopt electronically commutated...

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You may already be aware of the rising cost of energy and th...

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Expansion vessels are often treated as simple pipework acces...

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A chiller controls its capacity mainly by maintaining the le...

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Use this AS 1668.2 bathroom and toilet exhaust ventilation c...

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A local power meter only shows what is happening at the exac...

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Use this indoor pool and wellness centre calculator to estim...

Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

Refrigeration Cycles

As its name indicates, it’s in the evaporator that the...

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Air is the medium with which buildings are cooled and heated...

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Heat energy and change of phaseComfort air conditioning syst...

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Remember that R22 refrigerant vaporises at -42°C at atmo...

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Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

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Let’s remind ourselves of these two basic rules:There ...

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Condensate trays must be graded to drain continuously and pr...

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Before finalising the chiller selection, review the followin...

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Why is u-trap important and how to size an u-trap for air ha...

Natural Ventilation FAQ

Natural ventilation can be an effective way to provide outdo...

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The split system air conditioner has two parts: the indoor a...